Don Phillipson wrote:
What would cause a 9v Duracell battery to heat
up beyond (est.) 150 Fahr., not in use but when
removed and in a trouser pocket? Aftter storing
away the CO1 detector for the summer months,
I pocketed the batttery while watching TV: and
it heated up (rapidly) a couple of hours later: was
almost too hot to hold when I chucked it outdoors
onto the stone steps, cold this morning.

What pants were you wearing?